A009397 - OEIS

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A009397

Expansion of log(1+tanh(x)*sinh(x)).

0, 2, -16, 422, -22216, 1971002, -265691116, 50700975782, -13016429899216, 4327444080299762, -1808838826865938516, 928500311849311382942, -574198882099583321361016, 421058394568919310756145322

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

Log[ 1+Tanh[ x ]*Sinh[ x ] ] (* Even Part *)

CROSSREFS

Sequence in context: A283408 A343428 A282309 * A229023 A009700 A358784

Adjacent sequences: A009394 A009395 A009396 * A009398 A009399 A009400

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved